I G Internet Generation In Today world we are facing 3g,4g etc but we dont know what exactely they are.I try here to explain these concept in detail: Brief History On April 3, 1973, Martin Cooper, a Motorola researcher and executive, made the first mobile telephone call from handheld subscriber equipment, placing a call to Dr. Joel S. Engel of Bell Labs, his rival In India The then Union Telecom Minister Sukh Ram and the then Chief Minister of West Bengal Jyoti Basu spoke to each other using hand held mobile phones on July 31, 1995. It was a first for India 1G 1st Generation. Technology used: Analog radio signal speed: 2.4kbps service: voice only 2G The second generation of mobile cellular networks were launched in 1991 under the GSM standard. The main difference between the previous first generation and newer generation, was changing from analog based to digital based type of communication Technology: General Packet...
IP Tables Firewall in Linux IP Tables is a firewall that plays an essential role in network security for most Linux systems The packet filtering mechanism provided by iptables is organized into three different kinds of structures: tables, chains and targets ========>The default table is the filter table =======>The default policy is also a target. By default, all chains have a default policy of allowing packets. ======>A target decides the fate of a packet, such as allowing or rejecting it. =========================================== IP Table configuration tool: e.g., fwbuilder, bastille and ufw =================================== Ip table main file: /etc/sysconfig/iptables ==================================================== Tables There are three tables. Filter Rules to modify the packets This is the default and perhaps the most widely used table. It...
Create PPPOE(DSL) Connection on Linux I had faced lot of hurdle while setting pppoe connection on Ubuntu 18.4LTs. interesting thing is that not found any reliable link on google for that,here is step wise detail of setting dsl connection on Linux Prerequisites: ANI is my service provider Connection name is provide by ISP Username and password provided by ISP (ANI) IP and domain also provide by ISP Step 1create connection name: keenable@xxx:~$ nmcli con edit type pppoe con-name ANI Step2: Add user name. nmcli> set pppoe.username aa0003@elixir Step3:nmcli> set pppoe.password xxxxx step:Add service nmcli> set pppoe.servicename ANI Step4:set ip in network>ani>setting Step5: check the user name and other detail.and edit In ipv4 we can provide ip and domain which provided by isp
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